Core Silver Releases First Visuals From Drilling at the Laverdiere Copper Project

Executive Summary

• Core Silver released visual evidence from drill hole LAV25‑010, the first deep exploratory diamond hole at the Laverdiere Copper Project, showing continuous Cu‑Mo‑Ag mineralization from surface to >675 m depth.
• The hole confirms a laterally and vertically zoned, multi‑phase porphyry system that remains open both along strike and at depth, supporting the company’s model of a large copper‑silver‑molybdenum discovery in the Atlin Mining District.
• Assay results for all intervals are still pending; visual estimates are not indicative of grade.

Key Details

• Drill Program: 7 holes completed across 5 locations on the Valley Fault Zone, totaling 3,857 m (Table 1). LAV25‑010 reached a final depth of 703.77 m.
• LAV25‑010 Highlights:
• Intersected Cu‑Mo‑Ag mineralization and porphyry‑style alteration from surface to >675 m depth.
• Collared 1.8 km southwest of previous mineralization at North Adit (LAV22‑006).
• Visual evidence suggests marginal zones of a large ore body that is open laterally and at depth.
• Historical Context: Prior surface sampling in the Valley Zone returned up to 366 g/t Ag, 0.71 % Cu, and 0.54 % Mo earlier in the 2025 season. Historic drilling (1974) reported up to 1.60 % Cu over short intervals.
• Structural Interpretation: The hole crossed the Valley Fault Zone, confirming a multi‑phase porphyry system extending >4.5 km from North Adit to Lower Copper Creek and spanning multiple east‑west fault splays (>2.5 km).
• Visual Description: Core shows bornite, chalcopyrite, molybdenite, sulfosalts (Ag‑bearing), specular hematite, pyrite, quartz; upper oxidized zone with epithermal veins, deeper zones with increasing Cu‑rich chalcopyrite‑bornite mineralization.
• Assay Status: All assay results for LAV25‑010 and the other 2025 holes are pending; visual estimates should not be taken as grade indicators.
• Future Work: Company will release additional visuals and assay data as they become available; drilling at the Silver Lime Polymetallic Project is planned to follow this program.

Notable Quotes

“Drill hole LAV25‑010 provides our clearest view yet into the scale of the porphyry system at Laverdiere… The visual evidence at Valley points to a large, multi‑phase porphyry system that has the potential to evolve into a significant copper‑silver‑molybdenum system in the Atlin Mining Jurisdiction.” – Nick Rodway, President & CEO

Materiality Assessment: Non-Material – Positive (early‑stage visual confirmation of a large porphyry system; no quantitative assay data yet).